Available for: 1994-2009 CAT 3406E, C15, C16 Engines

Key Benefits

  • High Nickel Casting
  • Inconel Exhaust and Intake Valves
  • Stainless Steel Fire-Ring
  • Enhanced Airflow and Combustion Chambers
  • Improved Cooling Passages
  • Made in the USA

Warranty: 18 Month Unlimited Mile Warranty

PDI Big Boss CAT Stage 2 Cylinder heads for are meticulously designed to surpass the most demanding expectations, making them the perfect choice for heavy-duty applications in trucking, construction, agriculture, and more. They exemplify our unwavering dedication to innovation and superior quality. The Stage 2 Cylinder Heads are built with all Inconel valves, known for their exceptional strength and resistance to extreme temperatures, ensuring unparalleled durability and performance. Each Stage 2 cylinder head includes a stainless steel fire-ring, offering an extra layer of protection against the rigorous demands of higher horsepower applications.

OEM Serial Number Prefix Applications 5EK, 6TS, 1LW, 2WS, 6NZ, MBN, BXS, MXS, NXS, SDP, 1MM, 7CZ

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